Its already too broken. I don't know what oda would do with awakening. Or he chooses to never do it like in kaido and Bigmam case.
Yeah realistically that would happen like it did with them as you said.
Kaidos flame form and especially making Onigashima fly should be his awakening imo. Also his change in appearance,c he bulkier, more curvy eyebrow version of his hybrid.
Big Mom combining her homies, healing her bones, mass soul pocus etc could have been her awakening too.
Yami nullifying DFs (as well as semi permanent darkness) should be its awakening imo, along with Gura Gura tilting the sea and Marineford as part of the Guras awakening too.